Automatic filling nozzle



March 22, 193s.

H. K. ELINCHBAUGH 2,111,852

AUTOMATIC FILLING NOZZLE 'Filel Aug. 1'0, 1937 2 sheets-sheet 1ATTORNEYS.

-|11. K. FLINCHBAUGH 2,111,852

AUTOMATIC FILLING NOZZLE v March 22, 193s.

Filed Aug. lo, i957 2 Sheedzz-s-ShevetY v22 FIC- W.

[NVE/WOR.b ng h. Flin/bbw 1 `r @and ATTORNEYS.

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Patented Mar. 22,l 1938 UNITED .STATES PATENT OFFICE 8 Claims.

My invention relates to automatic valves and particularly to ones whichare actuated to close by the submergence of the nozzle end' in theliquid which has been discharged into a receptacle.

Still more specically, my invention is concerned with automatic valvesfor gasoline dispensing nozzles which automatically stop the flow of4gasoline when ,the gasoline in the container being filled submerges theend of the dispensing nozzle.

l0 This invention is a modication of my previous invention shown in myapplications for United States Letters Patent tiled September 16, 1936,

Serial No. 101,022, and the present application is a continuationI inpart of the said earlier application as to all common subject-matter.Accordingly the principal object of my present invention is theprovision of a simple and positively operating automatic valve for thenozzle of a gasoline dispensing unit, which can'be depended upon to shutoff the flow of gasoline when the end of the nozzle becomes submerged.Other objects and advantages will appear from the following'detaileddescription of a preferred embodiment of4 my invention, reference beinghad to the accompanying drawings.

20 Fig. I of the drawings is a side view of a nozzle and hand valve,partially in section to show the automatic valve of my invention placedin the end. of the nozzle, the automatic valve being open.

FigpII is a side view in section of the automatic valve portion of thenozzle shown in Fig. I, with the automatic valve closed.

Fig. III is la sectional view taken on the line III- III of Fig. I. Fig.IV is a sectional view takenon the line Je Iv-IV of Fig. I. j

Fig. V is a perspective view of the closure valve. Fig. VI is aperspective view of the operating cylinder in which the stem of theclosure valve moves.

Fig. VII is a perspective view of the spray control tube positioned atthe end of the nozzle. Fig. VIII is a perspective view of the internalnozzle/positioned between the spray control tube and the operatingcylinder mentioned above.

Fig.' IX is a perspective view of the removable end of the operatingcylinder having an automatic slide valve formed therein.

For the purposes of a detailed description of the device shown in thedrawings, that device may be conveniently analyzed into an outer nozzlel with hand control valve 2, an automatic valve .3 having an operatingcylinder 4, an internal nozzle 5 and a, spray control tube 6 separatedby an annular recess 1 from said internal nozzle 5.

. ment Il! in or out.

The outer nozzle l and hand control valve 2 are of a conventional typeand need not occupy us. The automatic valve 3 has a stem I0 formedintegrally therewith and extending into the operating cylinder 4. Thevalve 3 is formed to cause a convergence of the fluid stream into theinternal nozzle 5 in which a valve seat Il is formed. This J convergencemakes the internal nozzle 5 the constriction I5.

Extending longitudinally through the valve 3 10 and its stem I0 is aconduit1 I6. 'I'he lower end of the conduit i6'is enlarged to receive ina press fit an adjustment element I1. This adjustment element Ilregulates the sensitivity of the valve and this adjustment is Aeffectedby moving the ele- '15 The farther the element I1 projects, the greaterimpediment it is to the fluid stream through the valve 3. When a`greater port-ion of the element I'l is exposed to the pressure -of thefluid stream, it isclear that the resolved force urging the element Ildownward 20 against the pressure of the operating cylinder 4 iscorrespondingly increased. The angle of the uid stream impinging on theelement Il causes this resultant downward force. Hence the sensitivityof the automatic operation of the valve 3 may be regulated by varyingthis resultant force through changing the degree of projection of theelement I1.

' On the end of the valve stem ID is a piston I3 which works in thecylinder 4. in an obvious manner. Around the stem l0 is a coil spring I9urging the piston I8 upward and the valve 3 open.` In order to avoid thedanger of uid collection in the cylinder Il, drainage conduits 20 areprovided leading into conduit i6.

. At the upper end of the cylinder 4 is a head 23 in threaded engagementwith the cylinder I. This head 23 is shown in perspective in Fig. IX. Inthe head 23 is formed an inlet conduit 25 communicating with thecylinder 4 as will be hereinafter explained. A slide valve 28 slides inconduit 29 at the bottom of which isiormed a valve seat 3i). From thelower part of valve 28 a stem 3i depends and extends through a conduit32 into 45 cylinder 4,. resting on top of valve stem I0. The bottomportion of stem 3| is formed as shown in' Fig. IX with a flattened endin order to avoid interfering with the free ow of liquid through.conduit I6 in stem I0. The stem 3| ilts very loosely in conduit 32 inorder to permit the free flow of liquid therethrough when the conduit 25is open. i

The cylinder 4 `is held in position by radially extending segments 34,permitting the free flow of liquid through the spaces between the segments 36. At the bottom of each segment, ports 35 are formed, withconduits 36 connecting the ports 35 to the spaces between the segmentsliti. The cylinder ll is shown in perspective in Fig. VI.

These ports 35 prevent air pockets from forming during the flow ofliquid through the closure valve 3, and the interference with the properfunctioning of the device caused by such air pockets. Thus, there is in'eiect one solid stream through closure valve 3 instead of three separateones from the spaces between segments 34.

The internal nozzle t is constricted by the bevel form of the-valve 3 asexplained above and its discharge side is flared to direct the fluidstream over and without touching the annular recess 'l before hittingthe wall of spray control tube t at points fr0. The discharge side ofthe tube Ei is also constricted by a converging wall to eiect a goodfluid discharge. Two air ports 3B are formed between the inside of theouter nozzle i and the outside of the spray control tube ii, see Fig.III. These ports 38 lead from the end of the outer nozzle i to theannular space l between the spray control tube 5 and the internal nozzleEi. The function of these air ports 3d is that of breathers which inducethe 'luidistream discharged froml the internal nozzle 5 to follow itsnatural course over the annular recess l without filling up theclearance space between the stream and the spray control tube 6 at itsinner end. Dotted lines in Fig. I indicate the normal course of theiluid stream from inner nozzle 5.

From the above it will be seen that the flow of liquid through the outernozzle i is restricted at the oonstricted portion of the internal nozzlet, consequently forcing the liquid through by pressure. The lower orouter end of the internal nozzle t is tapered allowing the liquid tospread and to that degree guiding the spread of the flow to contact thespray control tube t at points till creating an air chamber around theannular recess l that has ports 33 to allow the how of liquid itsnatural breathing of air as it spreads. As the liquid flows through theinternal nozzle ii it is also ilowing through the conduit 25 into apressure chamber il of the cylinder d, out through the conduit it in thevalve stem il! and the valve 3, continuing through the adjustmentelement il into the center of the main ilow of liquid.

As the pressure increases or decreases in the vouter nozzle I the ow ofliquid through the internal nozzle 5 and through the adjustment elementIl also increases ordecreases with the pressure. It is to be noted thatythe conduit in element l'l is of a smaller cross sectional area thanthat of the conduit i6 and hence this adjustment element I1 is effectiveas a small nozzle at the end of conduit i6. Now as the flow of liquidincreases through the adjustment element i'l the flow of liquid thatencircles the element Il increases, increasing the pull of the liquidexhaust of the pressure chamber 4| out through the conduit IB. Thiscreates a more uniform pressure in the pressure chamber lll, thuscreating a Wider range of operating pressures of the automatic shut-olfnozzle than exists in the pump installations now in use.

The automatic shut-011 ltakes place when the liquid in the containerbeing lled reaches the discharge end of outer nozzle` I closing oil' theair ports 38 from the atmosphere which cuts oii" the air that is beingbreathed in by the ilow of liquid spreading as it ilows out of theinternal atmete duit 25 and completing the automatic shut-off.

To reopen valves 3 and 28, the hand control valve 2 is closed whichrelieves the pressure on the valves 3 and 2d and permitsv them to belifted from their respective seats il and 3i) by the pressure of thespring i9 to their normal position.

The adjustment element i7 is held by a press fit which can be moved toextend out of the valve t to a variety of lengths, which counteracts thepressure of the valve spring by the ow of liquid contacting the surfaceoi the sides of the adjustment element il from the angle of the flow atthat point. This creates an adjustment Iof the sensitivity of theautomatic valve by the amount of the surface of the element il' exposedto the flow.

While I have described this preferred embodiment of my invention indetail, it is obvious to one skilled in the art that numerous changesmight be made and such modications are deemed to be within the spirit ofthe invention as hereinafter claimed.

Having thus described my invention, claim:

1. The combination of an outer nozzle. a closure valve within saidnozzle, a closure valve stem, a conduit formed in said valve and valvestem longitudinally thereof, a pressure means urging said valve open, aclosing piston attached to the end of said valve stern, an operatingcylinder in which said piston operates, said cylinder having an inletport at the supply end of said cylinder, a control valve closing saidinlet port when said closure valve is in the closed position, aninternal nozzle into which said closure valve opens, a spray controltube positioned at the discharge end of said internal nozzle andextending to substantially the end of said outer nozzle, and an air ductleading from the end of said outer nozzle to a point between said innernozzle and said spray control tube.

2. The invention of claim l wherein the opera ating cylinder issupported within said outer nozzle by radially projecting portionshaving dis- .charge ports formed in the ends of said radially 4. Theinvention of claim 1 wherein an adjustment member is positioned at thedischarge end of said conduit formed longitudinallyin said closure valveand valve stem, said adjustment member having capacity for adjustmentlongitudinally of said valve stem.

5. The invention oi.' claim l wherein said internal nozzle and saidspray control tube are separated from each other by an annular recess.

6. l'I'he invention offc'laim 1 wherein said control valve is of thesliding type and has a depending stem connected to the valve piston andwhich rests on said closure valve stem vfollowing the movement thereof.

'7. In combination, an outer nozzle, a closure j l guasta 3 valve withinsaid nozzle, a pressure means foresure from said closing piston, whensaid closure lng said valve open to allow uidvsdischarse past valve isclosed.

said valve, a closing piston within said nozzle and 8. The invention ofclaim 7 wherein the exnormally exposed to the iluid pressure in saidhaust duct has an adjustable projecting nozzle 5 nozzle, an exhaust ductleading through said element attached toits lower end, the crossclosurevalve and discharging centrally into vthe sectional area of said nozzlebeing smaller than stream of liquidflowlng past said closure valvel,that of said exhaust duct and a control valve for cutting ol! saidiluid pres- HENRY K. FLINCHBAUGE.

